#main-content {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
#main-content > div:last-child {
    max-width: 25%;
    min-width: 19rem;
    min-height: 15rem;
    height: 100%;
    margin-right: 1.75rem;
}

.main-content {
    padding: 3rem 2rem;
}
.main-content > div {
    padding-bottom: 2rem;
}
.otoscopio-title h1 {
    padding-bottom: 2rem;
    font-size: 1.6rem;
    color: #333;
}


.navegation-text {
    background: #bbb;
}
.navegation-text h2 {
    color: #fff;
    padding: 1rem;
    font-size: 1.2rem;
    font-weight: normal;
}
.navegation-img {
    padding: 10% 20% 5%;
    background: #ccc;
}
.navegation-img img {
    width: 100%;
    height: auto;
}
.navegation-img img:first-child {
    margin-bottom: 2rem;
}


.caracteristicas h2 {
    color: #999;
    padding: 1rem 0;
}
.caracteristicas ul {
    padding: 0.5rem 1.2rem;
    padding-top: 0;
}
.caracteristicas li {
    font-size: 1rem;
    line-height: 1.5em;
    color: #999;
    margin-bottom: 0.2rem;
}

.item h3 {
    color: #999;
    padding: 1rem;
    padding-left: 0;
}

.itens span {
    font-weight: bold;
}
ul.itens {
    list-style: none;
}

ul.itens > li {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    height: 100%; 
    width: 90%;
}

ul.itens > li > p {
    font-weight: bold;
    padding: 1.5rem;
    font-size: 1.2rem;
    min-width: 8rem;
}

ul.itens > li:nth-child(odd) {
    background-color: #eee;; 
}

ul.itens > li > ul {
    padding-left: 0;
    list-style: none;
}

ul.itens > li > ul > li {
    padding: 0.5rem;
    margin-left: 20px;
    color: #999;
}

@media screen and (max-width: 325px) {
    ul.itens > li > p {
        padding: 1rem;
        min-width: 5rem;
    }
}

.item-number h2 {
    color: #999;
    padding: .5rem 0;
}
.item-number p {
    padding: 1rem 0 1rem 0;
}
.item-number ul {
    list-style: none;
    display: inline-block;
}
.item-number ul li {
    padding: 5px;
    color: #999;
}
.item-number ul li:not(p):nth-of-type(odd) {
    background-color:#eee;
}